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tint/writer/msl: Generate an array<T,N> helper

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And remove the WrapArraysInStructs transform.

Wrapping arrays in structures becomes troublesome for `const` arrays, as
currently WGSL does not allow `const` structures.

MSL 2.0+ has a builtin array<> helper, but we're targetting MSL 1.2, so
we have to emit our own. Fortunately, it can be done with a few lines of
templated code.

This produces significantly cleaner output.

Change-Id: Ifc92ef21e09befa252a07c856c4b5afdc51cc2e4
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/94540
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
This commit is contained in:
Ben Clayton
2022-06-24 17:01:59 +00:00
committed by Dawn LUCI CQ
parent 3c054304a8
commit f47887d207
218 changed files with 3637 additions and 2269 deletions
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24
test/tint/buffer/uniform/static_index/read.wgsl.expected.msl
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@@ -2,6 +2,18 @@
using namespace metal;
template<typename T, size_t N>
struct tint_array {
const constant T& operator[](size_t i) const constant { return elements[i]; }
device T& operator[](size_t i) device { return elements[i]; }
const device T& operator[](size_t i) const device { return elements[i]; }
thread T& operator[](size_t i) thread { return elements[i]; }
const thread T& operator[](size_t i) const thread { return elements[i]; }
threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
T elements[N];
};
template<typename T, int N, int M>
inline vec<T, M> operator*(matrix<T, N, M> lhs, packed_vec<T, N> rhs) {
return lhs * vec<T, N>(rhs);
@@ -14,11 +26,7 @@ inline vec<T, N> operator*(packed_vec<T, M> lhs, matrix<T, N, M> rhs) {
struct Inner {
/* 0x0000 */ int x;
/* 0x0004 */ int8_t tint_pad[12];
};
struct tint_array_wrapper {
/* 0x0000 */ Inner arr[4];
/* 0x0004 */ tint_array<int8_t, 12> tint_pad;
};
struct S {
@@ -32,9 +40,9 @@ struct S {
/* 0x0038 */ int2 h;
/* 0x0040 */ float2x3 i;
/* 0x0060 */ float3x2 j;
/* 0x0078 */ int8_t tint_pad_1[8];
/* 0x0078 */ tint_array<int8_t, 8> tint_pad_1;
/* 0x0080 */ Inner k;
/* 0x0090 */ tint_array_wrapper l;
/* 0x0090 */ tint_array<Inner, 4> l;
};
kernel void tint_symbol(const constant S* tint_symbol_1 [[buffer(0)]]) {
@@ -49,7 +57,7 @@ kernel void tint_symbol(const constant S* tint_symbol_1 [[buffer(0)]]) {
float2x3 const i = (*(tint_symbol_1)).i;
float3x2 const j = (*(tint_symbol_1)).j;
Inner const k = (*(tint_symbol_1)).k;
tint_array_wrapper const l = (*(tint_symbol_1)).l;
tint_array<Inner, 4> const l = (*(tint_symbol_1)).l;
return;
}